Hello,

If i'm not mistaken, it is only possible to use one WU Catalog on a project ?

Scenario : 
- Create Cat1 in Project P, with 2 WUs
- Create Cat2 in Project P, with 3 WUs
- Create Client order in project P, and select Work Units to add in the "Work Command" section :
=> only the 2 WUs from Cat1 are available for selection

I think it is perfectly acceptable that there is only one catalog valid on a project (for a given date).
But if this limitation is expected, then we should have some kind of validation mechanism in the application, or at least explain it in the user manual, to prevent unexpected user interactions.  (if it is mentioned in the manual, I missed it !)

Otherwise maybe it's simpler to just allow selecting lines from all WUs linked to the project.